Assistance Needed-Remotes

Last week, both my Sanyo tv and Emerson dvd/vcr combo went out. They are both in the same room and it was strange to see they both went out. I ordered new remotes from their prospective creators and neither one of them work either.

What could have happened to have both independent pieces go out at the same time? I have never experienced anything like this. Both units are no more than 2 years old.

If anyone can offer suggestions or solve the mystery, I would be grateful.. I hate to buy new stuff, but if I don't have a remote, it is a huge hassle.